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Gilou Tenebro | October 14th, 2009
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Trojan.Bredolab is a threat that has been distributed widely and consistently this year. This research paper takes a closer look at the Trojan to discover how it works, why it’s so widespread, and the motivations behind it.

In short, Bredolab is distributed by spam emails and drive-by-download attacks. (In fact, last month we blogged about a wave of spam emails used to distribute it.) Once it’s on a computer, Bredolab downloads and installs a variety of other threats. This process is outlined in the following diagram.
 
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We have seen Bredolab downloading password stealers, bots, rootkits, backdoors,...

Gilou Tenebro | July 3rd, 2009
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W32.Waledac has launched a new spam campaign using a 4th of July theme. Below are some screenshots of sample spam emails with the new theme.

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If the unsuspecting user clicks the link in the email, they will be directed to a Web page similar to the following:

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The page claims to contain a video of a fireworks show for this year’s 4th of July celebration. However, clicking on the "video" actually leads to a W32.Waledac executable. Watch out for spam containing any of the following strings...